161247944 has 64 divisors (see below), whose sum is σ = 361368000. Its totient is φ = 66481920.

The previous prime is 161247829. The next prime is 161247953. The reversal of 161247944 is 449742161.

It is a junction number, because it is equal to n+sod(n) for n = 161247898 and 161247907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66302 + ... + 68690.

It is an arithmetic number, because the mean of its divisors is an integer number (5646375).

Almost surely, 2^161247944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161247944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180684000).

161247944 is an abundant number, since it is smaller than the sum of its proper divisors (200120056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161247944 is a wasteful number, since it uses less digits than its factorization.

161247944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478 (or 2474 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 161247944 is about 12698.3441440213. The cubic root of 161247944 is about 544.2913033984.

The spelling of 161247944 in words is "one hundred sixty-one million, two hundred forty-seven thousand, nine hundred forty-four".